排序方式: 共有52条查询结果,搜索用时 78 毫秒
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枯水期嘉陵江小三峡附生藻类群落结构与水质评价 总被引:4,自引:0,他引:4
王明书 《西南师范大学学报(自然科学版)》1994,19(3):305-310
枯水期嘉陵江小三峡有4个附生藻类群落,即刚毛藻群落、颤藻-鞘丝藻群落、直链藻-等片藻群落和鱼子菜-红毛藻群落。根据Fjerdingstad提出的以生物群落指示环境污染,结合Kolkwitz的污水生物系统,以及枯水期小三峡浮游藻类优势种和其它理化指标进行综合分析结果表明,枯水期小三峡水质污染程度由低到高排列顺序为:沥鼻峡<温塘峡<观音峡,除毛背沱和水土沱为α-中污带水质外,其余各点均为β-中污带水质。 相似文献
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Estimation on the response of glaciers in China to the global warming in the 21st century 总被引:17,自引:0,他引:17
Glaciers in China can be categorized into 3 types, i.e. the maritime (temperate) type, sub-continental (sub-polar) type and extreme Continental (polar) type, which take 22%, 46% and 32% of the total existing glacier area (59 406 km2) respectively. Researches indicate that glaciers of the three types show different response patterns to the global warming. Since the Maxima of the Little Ice Age (the 17th century), air temperature has risen at a magnitude of 1.3℃on average and the glacier area decreased corresponds to 20% of the present total glacier area in western China. it is estimated that air temperature rise in the 2030s, 2070s and 2100s will be of the order of 0.4-1.2, 1.2-2.7 and 2.1-4.0 K in western China. With these scenarios, glaciers in China will suffer from further shrinkage by 12%, 28% and 45% by the 2030s, 2070s and 2100s. The uncertainties may account for 30%-67% in 2100 in China. 相似文献
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ZHOU TianJun LI Bo MAN WenMin ZHANG LiXia & ZHANG Jie The State Key Laboratory of Numerical Modeling for Atmospheric Sciences Geophysical Fluid Dynamics 《科学通报(英文版)》2011,(Z2)
To compare differences among the Medieval Warm Period (MWP), Little Ice Age (LIA), and 20th century global warming (20CW), six sets of transient and equilibrium simulations were generated using the climate system model FGOALS_gl. This model was developed by the State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences. The results indicate that MWP warming is evident on a global scale, except for at mid-l... 相似文献
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方华蓉 《文山师范高等专科学校学报》2013,(5):47-50
在现代思想启蒙的文化背景下,中国文学中涉及童养媳题材的创作比较丰富,作家们从解剖这一大众〉--j以为常的民俗入手,展开了对封建专制文化与国民劣根性的猛烈抨击,对挣扎在封建男权文化下的女性群体表达了深切的同情和反省。 相似文献
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影片《看上去很美》的叙事在幼儿园"小人物"方枪枪对教育规训的归顺与反抗中推进,揭示了在现代教育中理性、权力、秩序对人的肉体和精神的全面规训。影片从传统教育模式入手,反映出对现代教育的焦虑和担忧,具有超越时空的召唤意义,为当前教育规训提供了有益借鉴。 相似文献
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尹玲 《芜湖职业技术学院学报》2008,10(1):18-19
小概率事件原理是概率论中一个基本且实用的原理。本文讨论了小概率事件及其相关性质,说明了小概率事件和不可能事件的区别与联系,并以实例说明小概率事件在概率论及假设检验中的实际应用。 相似文献